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(11)

EP 2 561 651 A1

(12)

(43) Date of publication: 27.02.2013 Bulletin 2013/09 (21) Application number: 11718583.5 (22) Date of filing: 21.04.2011

(51) International Patent Classification (IPC):  H04L 12/56(0000.00) H04W 28/10(2009.01) (86) International application number: PCT/US2011/033497 (87) International publication number: WO 2011/133816 (27.10.2011 Gazette 2011/43)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 23.04.2010 US 766661 (71) Applicant: Research In Motion Limited Waterloo, ON N2L 3W8 (CA)	(72) Inventors: ZHAO, Xiaoming Irving, Texas 75039 (US) LING, Xinhua Waterloo, Ontario N2L3W8 (CA) (74) Representative: Finnie, Peter John  Gill Jennings & Every LLP The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)